S
M
T
W
T
F
S
26
87°
69°
27
83°
69°
28
81°
64°
29
82°
58°
30
87°
58°
31
83°
61°
1
72°
68°
2
81°
54°
3
83°
56°
4
87°
60°
5
86°
63°
6
80°
63°
7
83°
61°
8
85°
63°
9
84°
62°
10
83°
63°
11
84°
62°
12
79°
59°
13
81°
58°
14
79°
60°
15
80°
59°
16
76°
62°
17
84°
64°
18
84°
63°
19
85°
63°
20
82°
62°
21
83°
62°
22
83°
63°
23
82°
63°
24
81°
62°
25
80°
62°
26
81°
62°
27
80°
61°
28
75°
61°
29
79°
59°
30
78°
60°
31
81°
61°
1
80°
59°
2
76°
57°
3
75°
57°
4
76°
58°
5
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Plainwell
Plainwell's August 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 54° and 64°. The average high for August is 81° with an average low of 61°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Plainwell. See also: September | October | November.